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Activity Number:
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188
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Type:
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Topic Contributed
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Date/Time:
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Monday, July 30, 2007 : 2:00 PM to 3:50 PM
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Sponsor:
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IMS
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| Abstract - #310101 |
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Title:
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Phylogenies Unplugged: Consensus Trees with Wandering Taxa
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Author(s):
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Benjamin Redelings*+
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Companies:
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North Carolina State University
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Address:
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4305 Avent Ferry Rd Apt 2, Raleigh, NC, 27606,
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Keywords:
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Bayesian ; evolution ; phylogeny ; tree ; consensus ; wandering
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Abstract:
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Evolutionary tree topologies are discrete and unordered and so their posterior distributions cannot be summarized by a mean and variance. One common summary, the majority tree, represents the "center" of a topology distribution by combining supported taxa bi-partitions into a single tree. However, if a clade wanders widely over the topology of the remaining branches, the majority tree may collapse to a star tree that contains no information. I present an improved summary that can reveal hidden structure in the posterior distribution by representing wandering clades instead of removing leaf taxa. The summary is a generalization of multifurcating (MF) trees called a multi-connected (MC) tree. An MC tree can be represented as a collection of bi-partitions of leaf taxon subsets and has a useful visual representation as a graph containing all trees which contain these bi-partitions.
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- The address information is for the authors that have a + after their name.
- Authors who are presenting talks have a * after their name.
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